The default logic input pin states are determined by onboard pullup or pulldown resistors, but some input pins
can be driven to high or low state by the MCU output or DIP switch control. The MCU can be controlled from a
PC running TICS Pro software to program the device registers through I2C or SPI and also drive the DUT logic
inputs. To allow the MCU to control the pin input, SW[2] must be set to on.
See
for the logic pin mapping tables for the device start-up modes.
Table 3-3. Device Start-Up Modes
Start-up Mode
0
I
2
C Mode
1
SPI Mode
1. The input levels on these pins are sampled only during POR.
3.3 Switching Between I2C and SPI
To switch the EVM between I2C and SPI modes, the switches and jumpers must be configured as follows:
Figure 3-3. I2C Mode Jumper Configuration
Figure 3-4. SPI Mode Jumper Configuration
In SPI mode, GPIO2 must also be configured as
STATUS or INT
and
SPI Readback Data (SDO)
to support SPI
readback.
Figure 3-5. GPIO2 Setting for SPI Mode
EVM Configuration
AD
V
A
NCE INFO
R
MA
TION
10
LMK5C33216EVM User's Guide
SNAU260A – OCTOBER 2020 – REVISED FEBRUARY 2021
Copyright © 2021 Texas Instruments Incorporated